JPH0642598U - Transceiver lifting device for ships - Google Patents

Abstract

(57) [Summary] [Purpose] While operating a transducer installed in a vessel such as a fishing boat or a measuring boat that performs fish hunting, exploration of targets and topographical conditions in the sea, or confirms the position of a diver. The present invention also relates to an elevating / lowering device for a wave transmitter / receiver capable of smoothly elevating and lowering. A transmitter / receiver lifting device for projecting a sound wave transmitting and / or receiving a sound wave from the bottom of a ship and storing the sound wave in the bottom of the ship according to need. A hydrofoil having a hydrofoil having an outer diameter equal to or smaller than the outer diameter of the transducer is provided on the upper part of the transducer of the elevating shaft for elevating and lowering the vessel. Wave lifting device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides a transducer for transmitting and / or receiving sound waves provided in vessels such as fishing boats and measurement boats for detecting fish schools, exploring underwater targets and topographical conditions, and confirming the position of divers. The present invention relates to a device for elevating and lowering a wave transmitter / receiver of a ship that can be moved up and down from the bottom of the ship.

[0002]

[Prior art]

 An example of the above-mentioned conventional transmitter / receiver lifting device will be described with reference to FIG. FIG. 3 shows the case where the hoisting motor 4 is installed on the bottom 1 of a ship such as a fishing boat or a measuring ship. Rotational force is transmitted to the feed screw 8 fixed to the support column 3 via the shaft 5, the chain 6 and the sprocket 7 on the feed screw side. By the rotation of the feed screw 8, the female screw bracket 9 screwed to the feed screw 8 is converted into vertical thrust, and the lifting pipe 10 fixed to the female screw bracket 9 is used as the bearing 11 as a guide. Can be moved up and down. Therefore, the transducer 13 fixed to the tip of the lifting pipe 10 via the dome flange 12 can be projected below the surface of the bottom plate 2 or can be stored in the skirt portion 22 of the bottom plate 2. Has become.

That is, when the fish finder or the measurement is not performed, the transducer 13 is stored in the skirt portion 22, and when the fish hunt or the measurement is performed, the transducer 13 is placed on the bottom plate 2 surface. It projects downward and activates its function. In this case, in the case of fish detection, it is often performed while the fishing boat is traveling, and the lifting and lowering operation of the wave transmitter / receiver 13 is also often performed while traveling. In the case of a measuring ship, the elevating / lowering operation of the transmitter / receiver 13 may also be performed while the measuring ship is traveling in order to efficiently use the measurement time. It should be noted that, in FIG. 4, a transmitter, a receiver, a controller, etc. for operating the transceiver 13 are not shown and omitted.

[0004]

[Problems to be solved by the device]

 However, the following problems have arisen with the increase in speed of ships in recent years. That is, when the transducer 13 is stored during traveling, a hydraulic resistance proportional to approximately the square of the boat speed acts on the transducer 13 protruding from the bottom 1 of the ship and the lifting pipe 10, and when the bearings 11 rise, The frictional force between the hoisting pipe 10 and the hoisting pipe 10 causes a large load on the hoisting motor 4, and when this excessive load is detected, a safety circuit (not shown) operates and the hoisting motor 4 does not operate. It may not be able to be stored. Further, if the safety circuit described above is removed, the lifting motor 4 may be burned due to an excessive load. Also, when the wave transmitter / receiver 13 and the elevating pipe 10 travel while protruding from the bottom 1, due to the difference in outer diameter between the wave transmitter / receiver 13 and the elevating pipe 10, the water flow near them is disturbed and vortices, etc. are disturbed. However, there was a problem such as vibration of the lifting device.

[0005]

[Means for Solving the Problems]

 The present invention relates to a device for elevating and lowering a transducer for transmitting and / or receiving sound waves from the bottom of a vessel, wherein the transducer is projected downward from the bottom of the vessel or stored in the bottom of the vessel. The above problem can be solved by providing a hydrofoil having an outer dimension equal to or smaller than the outer diameter of the transducer on the elevation shaft of the lifting shaft that raises and lowers the vessel in the traveling direction. It is a thing.

[0006]

【Example】

 An embodiment of the transducer raising / lowering device of the present invention will be described with reference to FIGS. FIG. 1 shows the whole of the lifting device for a transmitter / receiver, and the same parts as those in FIG. FIG. 1 shows an elevating motor 4 and a feed screw 8 fixed to a column 3 arranged in a bent portion 21 of a ship bottom 2, a motor side sprocket 5 for transmitting rotation between them, a chain 6 and a feed screw side sprocket. The drive mechanism for moving up and down the elevating pipe 10 and the transducer 13 together with the female screw bracket 9 screwed to the feed screw 8 is the same as the conventional example shown in FIG.

According to the present invention, the hydrofoil 14 is directed toward the advancing direction of the ship on the lifting pipe 10 above the dome flange 12 that connects the lifting pipe 10 fixed to the female screw bracket 9 and the wave transmitter / receiver 13. It is installed almost horizontally. This hydrofoil 14 exceeds the outer diameter of the cylindrical transducer 13 as shown in the partially enlarged view of the ascending / descending portion shown in the front view of FIG. 2 (a) and the side view of FIG. 2 (b). It is fixed to the upper part of the dome flange 12 so that the lift force can be transmitted to the elevating pipe 10 with an outer dimension having no width and length. This can be understood from the flow rectifying action of the water flow in the cross-sectional view of the hydrofoil 14 shown in FIG. 2 (c). While the ship is traveling, an upward force proportional to about the square of the ship speed is applied to the lifting pipe. 10 acts to cancel the frictional force with the bearing 11 when the lift pipe 10 is lifted, and the load on the lift motor 4 can be reduced.

Further, even when the transducer 13 is lowered while the vessel is traveling or the vessel is traveling with the transducer 13 protruding from the bottom plate 2, the hydrofoil 14 causes the outside of the lifting pipe 10 and the transducer 13 to operate. The turbulence of the water flow near the dome flange 12 caused by the difference in diameter can be eliminated, and the vibration of the lifting device can be reduced. These actions differ depending on the shape, size, mounting position, etc. of the hydrofoil 14, but can be appropriately selected depending on the lifting drive means of the lifting pipe 10, the ship speed, the shape of the transducer 13 and the like. is there.

[0009]

[Effect of device]

 As is clear from the above description, according to the present invention, when the ship is traveling, when the lifting pipe is lifted in order to store the transducer protruding below the ship bottom surface inside the ship bottom, the hydrofoil By this, the hydraulic resistance to the lifting pipe can be reduced and lift can be applied, and the capacity of the lifting motor can be reduced. In addition, even when the transducer was projected below the bottom of the ship and traveled at high speed, the flow of water in the vicinity of the lifting pipe and dome flange was rectified by the hydrofoils to suppress the generation of vortices, etc. This has the effect of preventing vibration.

[Brief description of drawings]

FIG. 1 is a structural diagram showing an embodiment of the present invention.

FIG. 2 is a partially enlarged view of a main part of the present invention.

FIG. 3 is a structural diagram showing a conventional example.

[Explanation of Codes] 1 Ship bottom 2 Ship bottom plate 3 Strut 4 Lifting motor 5 Motor side sprocket 6 Chain 7 Feed screw side sprocket 8 Feed screw 9 Female screw bracket 10 Lift pipe 11 Bearing 12 Dome flange 13 Transducer 14 Hydrofoil

Claims (1)

[Scope of utility model registration request] 1. An elevating device for a transmitter / receiver, wherein the transmitter / receiver for transmitting and / or receiving sound waves from the bottom of a ship is projected downward from the bottom of the ship or stored in the bottom of the ship, if necessary. A ship characterized in that a hydrofoil having an outer dimension equal to or smaller than the outer diameter of the transducer is provided on the upper part of the transducer of the lifting shaft for raising and lowering the wave vessel in the traveling direction. Transducer lifting device.